Secure Random Number Generator

This solution must exclusively read from the kernel's Cryptographically Secure Pseudorandom Number Generator (CSPRNG) and fail closed. Userspace Random Number Generators (RNGs) and insecure RNG fallbacks will not be accepted.

Dependency:

Ubuntu:

libsodium-dev

Other systems:

Documentation at https://download.libsodium.org/libsodium/content/installation/

Usage:

Step 1: make Step 2: ./rnd-sodium [number]

Alternative method:

https://www.nist.gov/programs-projects/nist-randomness-beacon

References:

• https://www.2uo.de/myths-about-urandom/
• https://sockpuppet.org/blog/2014/02/25/safely-generate-random-numbers/
• https://blog.cr.yp.to/20140205-entropy.html